A 6-kW, 2-kWh lithium-ion battery energy storage system using a bidirectional isolated dc-dc converter

Nadia M.L. Tan, Takahiro Abe, Hirofumi Akagi

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

27 Citations (Scopus)

Abstract

This paper describes the design and operation of a 6-kW, full-bridge, zero-voltage switching, bidirectional isolated dc-dc converter for a 2-kWh lithium-ion (Li-ion) bank that is considered attractive as an energy storage system for applications to photovoltaic generation systems ranging from 10 to 30 kW. The dc voltage at the high-voltage side of the converter is controlled from 305 to 355 V as the battery voltage at the low-voltage side varies from 50 to 59 V. The galvanic isolation using a 20kHz transformer with a turns ratio of 6:1 provides flexibility in voltage matching and safety. This paper presents experimental verifications of bidirectional power flow into (battery charging), or out of (battery discharging) the Li-ion battery bank. The maximal efficiency of the dc-dc converter is measured to be 96.1% during battery charging, and 96.9% during battery discharging.

Original languageEnglish
Title of host publication2010 International Power Electronics Conference - ECCE Asia -, IPEC 2010
Pages46-52
Number of pages7
DOIs
Publication statusPublished - 2010
Externally publishedYes
Event2010 International Power Electronics Conference - ECCE Asia -, IPEC 2010 - Sapporo, Japan
Duration: 21 Jun 201024 Jun 2010

Publication series

Name2010 International Power Electronics Conference - ECCE Asia -, IPEC 2010

Conference

Conference2010 International Power Electronics Conference - ECCE Asia -, IPEC 2010
Country/TerritoryJapan
CitySapporo
Period21/06/1024/06/10

Keywords

  • Bidirectional isolated dc-dc converters
  • Energy storage systems
  • Lithium-ion battery
  • Zero-voltage switching

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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